Possible Clues:

• Lots of girls in class using heads for reasoning
• Reason to record one Conservative
• Reason police dog failed to get dope
• Debate team member's asset
• Solid reasoning
• 99th record? It stands to reason
• Reactionary Conservative institute having dig at Left's thinking
• Correct reasoning traps soldier in mountain pass heading north
• Anne leaves conga line as that makes sense
• Columbo's asset